Icom IC-551D Instruction Manual page 54

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о о
becomes as hot as 40 С (72 Е)
above room temperature.
The RIT LED goes out
even. though you did not
depress the RIT ON/OFF
switch to turn it OFF.
The RIT is automatically turned
OFF when the Tuning knob is
rotated.
Depress the RIT ON/OFF. switch
again to turn ON the RIT.
The frequency does not
change by rotating the
Tuning knob.
DIAL LOCK is engaged. Disengage the DIAL LOCK by
moving the DIAL LOCK switch.
The scale on the Tuning | The TUNING SPEED button was | Set the Tuning dial so that one of the
knob is not in calibration depressed when the Tuning knob | large increments is at the center point,
with the displayed fre- | was set with one of the small | and push the TUNING SPEED but-
quency. increments at the center point, | ton, and the scale will be calibrated.
the Tuning knob was rotated
when the DIAL LOCK was
engaged.
15. The last digit of the
_ memorized or displayed
frequency has changed to
0.
The TUNING SPEED button was
pressed, or the VFO Select switch
was turned while pressing the
TUNING SPEED button.
Release the TUNING SPEED button,
and set the unit to the desired fre-
quency with the Tuning knob.
Turn the Power switch and the
memory switch OFF, wait а few
seconds,. and. then turn. them ON
again.
The Power switch was turned
OFF and ON too quickly.
An abnormal figure is dis-
played on the display, or
the display fails to illu-
minate.
The main switch of the power
source was turned OFF or the
power plug was unplugged.
The memorized fre-
quencies are lost and the
display shows 51.000.0
when the power switch is
turned ON.
Use the optional memory power
source.
The power failed (when using the
AC power source).
The Switching circuit of the ele-
сігопіс keyer does not close
completely.
Unable to key when using
an electronic keyer.
Replace the keyer with one having a
voltage of less than 0.4М between the
two keying lines at the key down
position, or modify your keyer so
that the voltage is less than 0.4 Volts.
Polarity of the connection wires
from the keyer is reversed.
The MODE switch is not in the
CW position.
Connect the keyer wires observing
proper polarity.
Place the MODE switch in the CW
position.
19. The scan operation does
not function when the
MS/MW switch is pushed.
No. frequency is programmed in
the memory channels or the same
frequency is programmed in all
the memory channels.
Program the required frequencies in
the memory channels following the
instructions for "MEMORY-WRITE"
on page 19.